In the first episode of the Sunbow cartoon, "More Than Meets the Eye, Part One", there exists a scene in which Megatron addresses his recently revived Decepticon troops. Amongst the bots shown on screen are three unknown cassette bots. The blue could be Rumble/Frenzy, but there were never any orange or yellow cassettes. (Of course they were really added by the animators who were not sure yet which characters would be in the show.) Who were these robots and how come we never saw them again?
I'd like to think that these two bots are a couple of nit-wits that just wandered off on their own and continue to have their own misadventures as they wander the planet Earth. The profile of Error and [Glip] is inspired by Hamlet's Rosencrantz and Guildenstern.